package com.cyh.testdesignpattern.appearance;

import android.util.Log;

//投影仪
public class Projector {
    private static Projector instance = new Projector();
    public static Projector getInstance() {
        return instance;
    }

    public void on() {
        Log.i("Projector", "Projector on");
    }

    public void off() {
        Log.i("Projector", "Projector off");
    }

    public void focus() {
        Log.i("Projector", "Projector is focusing");
    }
}
